title: Multicomponent coupling approach to (+/-)-frondosin B and a ring-expanded analogue.
mesh_terms: D000818:Animals; D002384:Catalysis; D003500:Cyclization; D006576:Heterocyclic Compounds, 4 or More Rings / Q000138:chemical synthesis*; D007202:Indicators and Reagents; D008968:Molecular Conformation; D015394:Molecular Structure; D011161:Porifera / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D006576:Heterocyclic Compounds, 4 or More Rings; D007202:Indicators and Reagents; C421322:frondosin B